Heat dissipation structure for sealed optical machines

Abstract

A new heat dissipation structure for sealed optical machines comprises an optical machine housing, an LED light source, a light cone, a first Fresnel lens, heat insulating glass, a liquid crystal screen, a second Fresnel lens, and a reflector; the upper part of the optical machine housing is installed with a second heat dissipation fan. The invention adopts two independent heat dissipation systems inside and outside, which can greatly increase the heat dissipation performance of the optical machine, and the external heat sink of the external heat dissipation system and the light heat sink share a fan in parallel, simplifying the structure and reducing the cost. The second heat dissipation fan is integrated with the optical machine shell, which effectively reduces the height of the optical machine, reduces the volume of the optical machine, and achieves a better internal circulation, further improving the heat dissipation efficiency.

What is claimed is: 
     
       1. A new heat dissipation structure for sealed optical machines, comprising an optical machine housing ( 1 ), an LED light source ( 10 ), a light cone ( 9 ), a first Fresnel lens ( 7 ), heat insulating glass ( 6 ), a liquid crystal screen ( 5 ), a second Fresnel lens ( 4 ), and a reflector ( 2 ); an upper part of the optical machine housing is installed with a second heat dissipation fan ( 11 ); the LED light source ( 10 ), the light cone ( 9 ), the first Fresnel lens ( 7 ), the heat insulating glass ( 6 ), the liquid crystal screen ( 5 ), the second Fresnel lens ( 4 ), and the reflector ( 2 ) are arranged in sequence inside the optical machine housing; a first heat dissipation fan ( 8 ) is located on a front side of the LED light source and the light cone ( 9 ), and the second heat dissipation fan ( 11 ) is located above the reflector; a shell of the second heat dissipation fan is integrated with a structure of the optical machine; a lens ( 3 ) is located on a front side of the reflector ( 2 );
 a lower part of the optical machine housing is installed with an LED light source radiator ( 13 ), an external radiator ( 14 ), and an internal radiator ( 16 ); the LED light source radiator ( 13 ), the external radiator ( 14 ), and the internal radiator ( 16 ) are arranged in sequence; 
 a sealed space is formed between an interface of the optical machine housing ( 1 ), the internal radiator ( 16 ), and the external radiator ( 15 ) and the first Fresnel lens ( 7 ); the airflow blown by the second heat dissipation fan ( 11 ) in the sealed space is guided by the housing and then flows through the liquid crystal screen ( 5 ) with a higher temperature; after taking away the heat from the liquid crystal screen, the airflow will exchange heat with the internal radiator ( 16 ) to cool down, and then flow back to the second heat dissipation fan ( 11 ) after passing through the reflector ( 2 ); 
 the external radiator ( 14 ) and the LED light source radiator ( 13 ) are located at the same horizontal position; the airflow blown out by the first heat dissipation fan ( 8 ) passes through an inclined surface of the optical machine housing and then enters the external radiator ( 14 ) and the LED light source radiator ( 13 ), taking away the heat from the LED light source ( 10 ) and the sealed space. 
 
     
     
       2. The new heat dissipation structure for sealed optical machines of  claim 1 , wherein the optical machine housing ( 1 ) is divided into upper and lower parts; an optical module and the fans are located in the upper part of the housing, the optical module comprises the first Fresnel lens, the heat insulation glass, and the radiator components are located in the lower part of the housing. 
     
     
       3. The new heat dissipation structure for sealed optical machines of  claim 1 , wherein the first heat dissipation fan ( 8 ) is arranged on the side of the external radiator ( 14 ) and the LED light source radiator ( 13 ); the external radiator ( 14 ) and the LED light source radiator ( 13 ) are arranged side by side, and both share the first heat dissipation fan; an other end of the optical machine housing away from the first heat dissipation fan is provided with an air outlet ( 12 ); the external airflow is inhaled by the first heat dissipation fan ( 8 ) and blown to the external radiator ( 14 ) and the LED light source radiator ( 13 ), and the hot air is discharged from the air outlet ( 12 ). 
     
     
       4. The new heat dissipation structure for sealed optical machines of  claim 1 , wherein the second heat dissipation fan ( 11 ) is arranged horizontally to the internal radiator ( 16 ) and is located on the upper part of the reflector ( 2 ); the airflow blown by the second heat dissipation fan ( 11 ) in the sealed space is guided by the housing and then flows through the liquid crystal screen ( 5 ) with a higher temperature; after taking away the heat from the liquid crystal screen, the airflow will exchange heat with the internal radiator ( 16 ) to cool down, and then flow back to the second heat dissipation fan ( 11 ) after passing through the reflector ( 2 ), so as to form a closed “O”-shaped heat dissipation air path. 
     
     
       5. The new heat dissipation structure for sealed optical machines of  claim 2 , wherein the optical module comprises the first Fresnel lens ( 7 ), the heat insulating glass ( 6 ), the liquid crystal screen ( 5 ), the second Fresnel lens ( 4 ), and the reflector ( 2 ); the reflector ( 2 ) is arranged at the output end of the second Fresnel lens ( 4 ) and is inclined, and the reflective surface of the reflector ( 2 ) faces the lens ( 3 ); the liquid crystal screen ( 5 ), the heat insulating glass ( 6 ), and the first Fresnel lens ( 7 ) are sequentially arranged on one side of the second Fresnel lens ( 4 ), and are located at the output end of the optical module. 
     
     
       6. The new heat dissipation structure for sealed optical machines of  claim 5 , wherein a lower end of the heat insulating glass ( 6 ) is inclined towards the liquid crystal screen ( 5 ) to increase the air velocity.